	US 11,703,290 B2
	Radiative cooling device including paint coating layer composed of nano or micro particles
Heon Lee, Seoul (KR); Dongwoo Chae, Seoul (KR); Soomin Son, Seoul (KR); and Hangyu Lim, Seoul (KR)
Assigned to ZERC, Seoul (KR)
Filed by ZERC, Seoul (KR)
Filed on Dec. 3, 2020, as Appl. No. 17/110,489.
Claims priority of application No. 10-2020-0158664 (KR), filed on Nov. 24, 2020.
Prior Publication US 2022/0163271 A1, May 26, 2022
Int. Cl. B32B 7/027 (2019.01); F28F 13/18 (2006.01); B32B 7/023 (2019.01); C09D 7/61 (2018.01); C09D 7/40 (2018.01)

CPC F28F 13/185 (2013.01) [B32B 7/023 (2019.01); B32B 7/027 (2019.01); C09D 7/61 (2018.01); C09D 7/66 (2018.01); B32B 2307/416 (2013.01); F28F 2245/06 (2013.01); F28F 2255/20 (2013.01)]

20 Claims

1. A radiative cooling device comprising:

a paint coating layer comprising

nano or microparticles of which a particle size and a composition are determined in consideration of infrared emissivity and reflectance to incident sunlight in a wavelength range corresponding to a sky window; and

a binder mechanically connecting surfaces of the nano or microparticles in a solvent,

wherein the nano or microparticles comprise at least one material selected from the group consisting of SiO₂, Al₂O₃, CaCO₃, CaSO₄, c-BN, ZrO₂, MgHPO₄, Ta₂O₅, AlN, LiF, MgF₂, HfO₂, and BaSO₄.